Source: dccomics.com

1. Sinestro

The obvious number one is obvious. Sinestro is THE Green Lantern bad guy. Well, THE Hal Jordan bad guy, but y'know.

Thaal Sinestro was a native of the planet Korugar in the space sector 1417. He was an anthropologist who spent his time preserving the order of ancient ruins. One day, the Green Lantern of the space sector crashed on Korugar, pursued by a Weaponer of Qward. Sinestro grabbed up the Lantern's ring when he was critically injured and used it to defeat the Weaponer. When the Lantern begged for his ring back, Sinestro declined and let him die so he could become the new Green Lantern.

Using the ring, Sinestro became a feared dictator on Korugar, ruling the planet with an iron fist. That is, until his new apprentice, hotshot GL of sector 2814 Harold "Hal" Jordan, saw what was going on and fought back against him. Hal defeated Sinestro and got him banished from the corps. Sinestro discovered Qward for himself, however, and convinced the Weaponers to build him a new yellow power ring, capable of exploiting the flaws in the Green Lanterns' greatest asset. Hal and Sinestro have clashed ever since, becoming the greatest of foes.

And there we go, the ten best Green Lantern villains, only some of whom you'd ever heard of! Did your favorite make the list? Honestly, probably, since there aren't that many. Unless you're just a huge fan of Sonar, in which case"¦no, yeah, I get it, Sonar's pretty cool. Honorable mention: Sonar.